Levi lysander lamb



UNITED. STATES PATENT OFFICE.

LEVI LYSANDER LAMB, OF AKRON, OHIO, ASSIGNOR TO THE W HITMAN 8t BARNESMANUFACTURING COMPANY, OF-SAME PLACE.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 315,149, dated April],1885.

Application filed September 11, 1884. (No model.)

To all whom it may concern:

Be it known that I, LEVI LYSANDER LAMB, of Akron, in the county ofSummit and State of Ohio, have invented certain new and usefulImprovements in Drilling-Machines; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it pertains to make anduse the same.

My invention relates to improvements in drilling-machines designed moreespecially for drilling the heads of mowing-machine knives and sicklesfor mowers, reapers, &c., the obect being to provide the sliding restfor the cutter-head with awrist or pin to fit the lateral bore of thehead, and a ratchet-gage and pawl so arranged that the rivet-holes maybe drilled accurately in the proper relative pos1ti0n to each other andto said lateral bore.

With this object in view my invention consists 1n certain features ofconstruction and in combinations of parts, hereinafter described, andpointed out in the claim.

In the accompanying drawings, Figure 1 is a view in side elevation ofaportion of a drillpress with my improvements attached. Fig; 2 1s a viewin perspective of the table and attachments, with the slide-rest for thecutter-bar in position, and showing also the ratchet gage and pawl. Fig.3 is a view in side elevation of the slide with a knife-head inposition; and Fig. 4 is a View in perspective of one form of knife-head.

A represents the frame of the drill-press, having a rack, 64, engaging apinion (not shown) on the shaft B, and provided outside of the bearingwith a ratchet-wheel, B, pawl b, and crank 12, for raising and loweringthe table 0.

Mounted in a suitable box in the upper part of the frame is thedriving-shaft 'D, provided with the cone-wheel D and the pinion d, thelatter engaging the pinion e of the spindle E, to the lower end of whichlatter is secured the drill e. The upper end of the spindle is providedwith the sleeve E, threaded on the outside to engage threads in the parta of the 7 frame A, and to which is attached the handwheel E or thespindle may have attached any of the well-known devices for raising andlowering it to feed the drill.

The mechanism thus far described is of ordinary and well-knownconstruction. The table O has the ways 0, on which slides the part F,which latter is actuated by the screw-rod F and the hand-wheel F. Thepart F has an upright part, f, that forms ways for the sliding restG.This part F also has a hollow upright post, f, in which slides the rodH, that is held in position by the set-screw h. The rod H is providedwith a transverse slot, through which slides the bar H, and with aset-screw, h, for holding said bar in position. The forward hole, h, forthe passage of the drill holds the drill steady, and prevents the samefrom being strained laterally. The part G has a latorally-projectingpin, that fits the lateral bore I of the knife and sickle-head I, andmay have the block G, provided with the slot 9, through which the boltthat secures the block to the part G,'passes, and so arranged that theblock G may be raised or lowered and brought into proper position tosupport the head I.

The part G is provided on its rear side with the gage J, having notches,as shown.

The part f has attached the arm K, provided with a long slot, k, throughwhich the bolt k, that secures the arm to the partf, passes, and bymeans of which it may be adjusted as required.

To the arm K is pivoted the pawl L, that engages the notches on the gageJ. The front end of the pawl is made heavy and serves as acounter-balance, and causes that point of the pawl to engage the saidnotches.

In manufacturing the knife and sickle heads it is essential that theholes be drilled to correspond to the holes in the knife and sicklebacks to which the heads are attached, and also that the holes be .madein a given position relative to the bore I, so that when the knife andsickle heads and sections are all secured these part will all be in theexact position re quired to coact with the other parts of the machine.

The hole I is first made to fit the pin, wrist, or other device thatconnects the head with the connecting-rod or mechanism that reciprocatesthe knife-head. The head is then placed in position on the part G, withthe pin 9 fitting snugly within the bore I. The notches on the gagecorrespond with the holes that are to be drilled in the head I, and thepawl L set by means of the slotted arm K so that the notches are in therequired relative position to the pin g; The end hole near the bore I isusually bored first, and the part G is slid along by hand until the pawlL engages the next notch on the gage J. This brings the parts inposition for drilling the next hole, and so on until all of the holesare drilled.

. After the parts are once adjusted any number of heads may be drilledwith accuracy and dispatch. The bar H is placed close to the work, sothat the drill is guided accurately.

The knives and sickles complete-that is, with the heads and sectionsattached-are usually made a specialty by some manufacturers, that supplythe trade with these goods, and there are about as many different knifeandsickle heads asthere are'reapers and mowers in the market. 7

A slide-rest, G, that will fit the part f is therefore made for eachdifferent kind of knife and sickle head, and has, with a pin, 9, to fitthe respective lateral bore of the different head, and with a suitablegage. The pawl L has only to be adjusted for each head, and as these areusually made in larger quantities the adjustment of the pawls from timeto time is but a slight hinderance.

Having fully described my invention,what I claim as new, and desire tosecure by Letters Patent, is-

In a machine for drilling knife and sickle heads, a sliderest adapted tosupport the heads, and provided with a pin or equivalent device adaptedto fit the lateral bore of the heads, and a gage with notches tocorrespond with the holes to be drilled, attached to said slide-rest,and an adjustable pawl to engage the said notches and act as a stop, theparts being so arranged that by the action of the pawl and gage theholes in the cutter-bar'head may be drilled in the proper positionrelative to each other and to the said lateral bore of the head,substantially as, set forth.

In testimony whereof I sign this specification, in the presence of twowitnesses, this 2d day of September, 1884.

LEVI LYSANDER LAMB.

Witnesses:

ALBERT E. LYNCH, OHAs. H. Donna.

